Sound radiation and transmission loss characteristics of a honeycomb sandwich panel with composite facings: Effect of inherent material damping

Arunkumar, M.; Jagadeesh, M.; Pitchaimani, Jeyaraj; Gangadharan, K. V.; Babu, M.C. Lenin

doi:10.1016/j.jsv.2016.07.028

Cited by 73 publications

(23 citation statements)

References 27 publications

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“…Few studies have revealed the advantage of using honeycomb cores to improve the STL of sandwich structures. Arunkumar et al [60] carried out a numerical study on the STL of sandwich structures with honeycomb core. In their study, honeycomb cores made from epoxy/graphite fiber reinforced polymer (FRP) were compared with those made from aluminum.…”

Section: Sandwich Core Support Structuresmentioning

confidence: 99%

Comparative Study of Sound Transmission Losses of Sandwich Composite Double Panel Walls

2020

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The increasing motivation behind the recently wide industrial applications of sandwich and composite double panel structures stems from their ability to absorb sounds more effectively. Meticulous selection of the geometrical and material constituents of both the core and panels of these structures can produce highly desirable properties. A good understanding of their vibro-acoustic response and emission index such as the sound transmission loss (STL) is, therefore, a requisite to producing optimal design. In this study, an overview of recent advances in STL of sandwich and composites double panels is presented. At first, some salient explanation of the various frequency and controlled regions are given. It then critically examines a number of parameter effects on the STL of sandwich and composite structures. Literatures on the numerical, analytical and experimental solutions of STL are systematically presented. Efficient and more reliable optimization problems that maximize the STL and minimize the objective functions capable of degrading the effectiveness of the structure to absorb sounds are also provided.

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Section: Sandwich Core Support Structuresmentioning

confidence: 99%

Comparative Study of Sound Transmission Losses of Sandwich Composite Double Panel Walls

2020

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“…Based on the multilayered equivalent FEM model, equivalent material parameters are used as variables. e equivalent parameter formula is linear and reversible [26], and each change in cell size/embedded depth leads to a change in the material parameters; therefore, the relationship between cell size/embedded depth and natural frequency can be understood indirectly. e following subsection discusses the effect of cell size and embedded depth on the natural frequency of an embedded honeycomb plate.…”

Section: Embedded Honeycomb Structure Geometry Effectmentioning

confidence: 99%

Multilayered Equivalent Finite Element Method for Embedded Honeycomb Plates

Haohui

Sheng

2018

Shock and Vibration

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To investigate the mechanical properties of embedded honeycomb plates with high efficiency and accuracy, a new multilayered equivalent finite element method (FEM) model is proposed. A series of FEM numerical studies (modal analysis, static analysis, and shock spectrum analysis) are performed. The goal is to compare the errors produced by the multilayered equivalent method and by existing equivalent approaches. The obtained results indicate that the proposed model shows good agreement with the original plate. Moreover, based on the new model, a parametric study correlating the microstructure parameters (embedded depth/cell size) to modal frequency is proposed, and a multiparameter equation for frequency and embedded depth/cell size is established to serve as a basis for structural optimization design.

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“…Based on eqs. and , a three‐dimensional form of thermodynamic stress–strain–temperature constitutive model for SMP has been developed . The segmented formula is expressed as follows

{\dot{ɛ}}_{i j} + \frac{5 ν - 1}{3 (1 - 2 ν)} δ_{i j} {\dot{ɛ}}_{k k} = false{\begin{matrix} left & \frac{(1 + ν) {\overset{σ}{true}}_{i j}}{E} + \frac{σ_{i j}}{μ} - \frac{ɛ_{i j}}{λ} - \frac{1}{3} true(\frac{E}{μ true(1 - 2 ν true)} - \frac{1}{λ} true) δ_{i j} ɛ_{k k} + α \overset{T}{true} δ_{i j}, as {\overset{ɛ}{true}}^{c} true(t true) < ɛ^{l} true(T true) \\ left & \frac{(1 + ν) {\overset{σ}{true}}_{i j}}{E} + \frac{σ_{i j}}{\bar{μ}} - \frac{ɛ_{i j} - {\overset{ɛ}{true}}^{s} true(T, C true) δ_{i j}}{\bar{λ}} - \frac{1}{3} true(\frac{E}{\overset{μ}{true} true(1 - 2 ν true)} - \frac{1}{\bar{λ}} true) δ_{i j} ɛ_{k k} + α \overset{T}{true} δ_{i j}, as {\overset{ɛ}{true}}^{c} <...> \end{matrix}

…”

Section: Thermo‐mechanical Constitutive Model For Smpmentioning

confidence: 99%

“…in which it is made of SMP and used to the composite structure in engineering application . Referring to the work by Arunkumar et al ., a diagram of sandwich plate with SMP honeycomb core is shown in Figure . The upper and lower skins and a layer of light SMP honeycomb core in the middle are compounded into a honeycomb sandwich plate in Figure (a).…”

Section: Model Of a Smp Honeycomb Corementioning

confidence: 99%

Numerical study of smart honeycomb core using shape memory polymers

Tao

Yang

Zhang

et al. 2017

J of Applied Polymer Sci

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Shape memory polymers (SMPs) attract widespread attention because they are able to maintain a temporary deformation after unloading and recover the initial shape under high temperature conditions. Based on a three-dimensionally constitutive equation of SMPs, a finite element program is followed by compiling user-defined material subroutine, which describes the shape memory behavior of thermo-mechanical experiment. A honeycomb core using SMP is designed, which has the ability to recover the initial shape after deformation and be used as a smart core for sandwich structures. To prove their advantages in the engineering application, a series of thermodynamic behaviors of the SMP honeycomb core are simulated, including loading at high temperature, cooling, unloading at the low temperature, and recovering original shape on heating. Shape memory behaviors of tensile, compressive, bending, and locally sunken deformations are demonstrated and the effect of time and temperature on the recovery process is discussed. V C 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45672.

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Sound radiation and transmission loss characteristics of a honeycomb sandwich panel with composite facings: Effect of inherent material damping

Cited by 73 publications

References 27 publications

Comparative Study of Sound Transmission Losses of Sandwich Composite Double Panel Walls

Comparative Study of Sound Transmission Losses of Sandwich Composite Double Panel Walls

Multilayered Equivalent Finite Element Method for Embedded Honeycomb Plates

Numerical study of smart honeycomb core using shape memory polymers

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